Projector.



J. D. McDUNAllD.

PRGHGTOR.

APPLICATION FILED DEC..1916.

Patented May 28, 1918.

Dventor: James llm Donmi q Q q 4% 2 SHEETSSHEET I.

Fig.2.

l. D. MCDONALD.

PROJECTOR.

APPLICATION FILED DEC. I.

m Patented May 28,1918.

2 SHEEYSSHEET 2.

inventor: James D. TD Donald Hts flttorneg.

JAMES D. MODONALD, 0F LYNN, MASSACHUSETTS, ASSIQNOR TO GENERAL ELECTRICCOMPANY, A CORPORATION OF NEW YOR rno'anoron Application filed December1, 1916.

are commonly provided with a reflector especially of the parabolic type,located back of the light source, so as to throw the beam of lightforward. It is, of course, important that the light source should, asnearly as possible. he made to co incide with the focus of thereflector, since any displacement therefrom, such as is likely to resultfrom shocks incident to the movement of the vehicle or from faulty cowstruction of the lamp itself, disturbs the parallelism of the raysconstituting the re flected beam.

Other novel features of my invention in the direc- Fig. 3 1s a detailview; Fig. 1 showing my invention; Fig. 5 1s a cross section on the line5-5 of Fig. 4; and Fig. 6 is a detail View of certain parts shown inFig. 4. I

eferring now to the drawings, and first Fi s. 1, 2 and 3, 10. is aheadlight casing at the back at 10 and provided at e front with a door11 which 18 hinged at e reflector which be of any usual form, isindicated by the. numeral 13. The bulb of an, incandescent lamp 14 1slocated within the reflector in such a position that the filament of thelamp ma be m e to coincide with the focus of the reflector. The lampsocket extends rearwardly through a modified form of Specification ofLetters Patent.

H socket 18 an opening 13 in the cen- Patented May 28, 1918. Serial No.134,313.

ter of the reflector, and is mounted in a sup port which affords thelamp a universal movement. This support may be the same as that shown ina Patent #1,196,506, which was issued to Percy i. Bail 29, 1916, and tomade for details further thanthose here described. T is supporting meanscomprises what is essentially a ball and socket joint, the ball 16 beingprovided with a central opening throu h which. the socket of the lamppasses. ecause of the fact that the reflector that but a slight movementof the into focus, I have shown the ball as consist ing of only a smallsection of a sphere. The member 16 is split shown in Fig, 2, and ispreferably provided with a U-shaped section 17 which is somewhat elasticand is so biased as to open the ball away from the lamp socket whenpressure on the same is released. The ball 16 is surrounded by asomewhat thicker than the memr ber 16, and which preferably comprisestwo members l8" and 18 pivoted together at no member 18 of the socket ispreferably stationary and is secured by screws 20 on bosses (not shown)on a plate 21 which is secured by screws 22 to the rear portion 10* ofthe casing. The two sections of the a pin 2;, engages a boss on thesection 18 of the socket. The inner end of the rod 23 is screw-threadedand engages a corresponding screw-threaded opening of the member 18" othe socket. he outer end of the rod 23 is provided with a suitablehandle IOtEtIlII the member 23, so that the may ht into clampinengagement with the bal 18 or released rom engagement therewith.

ow, in order to impart to the lamp a universal movement vide a member Acomprising a spanner 27 (see Fig. 3) pivoted to the socket of the lampat 28. The member A also comprisesa about its support, I proside of thecasing which acts as a pivot for the member, and a rod or bar 31 alsosecured bring the same to the spanner on the upper side and passingthrough all enlarged opening 313 in the Wiper sido of the e sing. Thisopening is cowm-l by a (rug; 35:1 whichl om'wi lo the upper ("ml hm 31and unsllilllrs lml's l piw. "ill the nwm -c'r ll m r be Mon 1 i i'lVlot-lolly in any Er well {he ii iii; lfi'lllll'fi llljl l jngg; as n pii a or axial clisplaomnwl or longilmlinnlly o. vertical moren'lom oienabled to import a sail movenionL ol' the lump about. supp The opening31% in {he upper sills of tin using is surrounded by an, annular ringill on which 1L disk 35 is seated, a, sprinq 36 being inlerposodlJP-l1\\(K-l11 the cap 33 nnrl rhe disk 35.

To adjust tho position of tho lump it is only necessary first in releasethe smtket, 18 win its clamping position about the ba ll 16 by turning:the handle Then. by moving lump. 1 am ml l'hu ham in 33 riliherlnlernlly or longitudinnlly, 1e lamp may be moved about; Ms sup pom, 5!!any rlesii'wl ri l-notion owl ln'ongh the focus i the ref lm'.

i, uni l have ixinm'n in ino ihoillorl in :1 L i m ni; ii /poi fromllijkifill l virloo i will; #1 non: ZjtlfbiUil which iniionrlod lopron-n no "gh an opening in the dashboard. lln the form here shown, thesocket of the lamp is not; err gaged by a, ball and socket support, buttin:- rear end of the socker is engaged by suitable springs preferablytl'lree in number, mounb ed on the. rear of the casing and oxtendingforwardly out; mooring toward the axis of the headlight. "he mgs stoked,engage lb rear 9 H10 eels-0t; of (he lamp and m wrd a l 3 nmvsment'lherefor. Be use of ti": mited amount. of space Within the casing of alamp of this type, I have shown a niemier for imparting to the lamp auniversal movement about this support but which differs therefrom incertain details, although it ::s the same in principle as that shown inFig. 1. In the form of headlight here shown, the spanner of the member Ais located Within the contracted portion of the casing at the rear, andit is therefore necessary to bend the rods 29 and 31 around thereflector. The rod 31" passes through an opening in the wall of a cupsecured to the inner Wall oftho casing 10 end on the upper pron l w h :lsuitable opernl lng handleylfi.

in molar lo .auljusb the position of the lamp shown, in l lgs. *1, 5,lllld 6, the parts of the bushing B are unolumpml by unscrewing thesleeve whon tho bushing); may be moved lull, rally or in rerlirnl lanolo any desired posriion and rlnmpoll in the mfljuslerl posilion. byagain screwing home the sleeve 42. lie will lhr understood, of course,that tho l'i/Ll 13L now be moi'erl .lol'lgiludinnlly the. so ms was Ill:1? shown 11*. {he previous figures.

i 251:: lrovifilons of We the pran a togrllier i l ulnnn v5.11 anddesire to scours by in i' illhlli of ilr; United States, is:-

1. A. headlight comprising a, casing, a rellln'lor located therein, anincandescent lamp lomner within the reflector, a support for the lumpafi'ording the. smile a universal mo omenl, and a member engaging thelump socliot, one oml of sni' l member being pivoberl in the casing andrho other end passing llnough and inter-Lilly mm able in the opposilrsirle of the casing whereby the position of said lump may be adjustedwith reference to the reflector from without the easing.

2. A headlight comprising ;i casing, a re flector, local rd therein, anincandescent la n located within the reflector, a support All the lampaflordlng the some a universal movement, and a, member engaging the lampsocket, one end of said member being pivoted in the casing and the otherend passing through and laterally-- movable in. the oppo site side ofthe casing, and means for securing the lamp in its adjusted position.

In Witness whereof, I have hereunto set my hand, this 28th day ofNovember, 1916. JAMES D. MODONALD.

